no union rep at school

I need to involve my union in something. However, I'm an NQT and totally clueless about how I might go about this as we have no rep at school atm. I've searched the union website but got lost in a sea of job descriptions and office addresses. I'm assuming I need a regional or a local something or other but the options seem endless. Any ideas? please help!

Regions are organised differently. Some regions are big and may have divisional offices, in which case you would need to contact the divisional secretary. If not then the regional secretary and arrange a meeting with them or another casework officer of the union (it is quite normal to have such meetings in school, out of directed time).